Listening for that DNS propagation

Note to self. I've had the joy of bringing a few sites live the last days, and in one case it was a multi-site with 7 different domains. During the process I needed a simple overview of the DNS propagation status. Before I've used online sites for this kind of stuff, but this time i reached for a CLI way instead, which I ended up liking. I used the watch command in the CLI for this (installed via…